Despite the title, this is not so much about Mars, but about Mars rovers, technical issues about them and the people behind them. It is quite surprising too see how much technical problems they really had and how they solved them. Rovers are extremely complex machines, requiring many custom made parts unique to them. This makes them very difficult and expensive to test; breaking a 5 million dollar worth equipment during stress test is not a desired outcome, but still it has to be done. Documentary is filled with details like this and is really worth watching to appreciate the work that has been done there.

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